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Take a ladder with 5 steps, write a function that gives all the possible combinations of either 1,2, or 3 steps, in any order, to get to the 5th step, and returns the total number of combinations. So some of the possibilities would be [1,1,1,1,1], [1,1,1,2], [1,1,2,1], etc. Then he asked the same question with order not being considered, so [1,1,1,2] and [1,1,2,1] are the same solution.
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Software Engineer

Interviewed at Walmart

3.4★
Jul 16, 2013

Take a ladder with 5 steps, write a function that gives all the possible combinations of either 1,2, or 3 steps, in any order, to get to the 5th step, and returns the total number of combinations. So some of the possibilities would be [1,1,1,1,1], [1,1,1,2], [1,1,2,1], etc. Then he asked the same question with order not being considered, so [1,1,1,2] and [1,1,2,1] are the same solution.

1. Reverse string except spaces. A string has mix of alphabets and spaces. Your task is to reverse the string, but preserve the positions of spaces. For example, reverse of " a if" is " f ia" 2. An array of size n has all but one numbers between 1 and n+1. Find the missing one.
avatar

Software Development Engineer

Interviewed at Microsoft

4★
Jun 11, 2015

1. Reverse string except spaces. A string has mix of alphabets and spaces. Your task is to reverse the string, but preserve the positions of spaces. For example, reverse of " a if" is " f ia" 2. An array of size n has all but one numbers between 1 and n+1. Find the missing one.

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